<template>
  <div>
    <div id="root">
      <div class="todo-container">
        <div class="todo-wrap">
          <TodoHeader  :recieve="recieve"/>
          <TodoList :todoArr="todoArr" :changeTodo="changeTodo" :delTodo="delTodo"/>
          <TodoFooter  :todoArr='todoArr' :checkAllTodo="checkAllTodo" :clearAllTodo="clearAllTodo"/>
        </div>
      </div>
    </div>

    <hr />
    
  </div>
</template>

<script>
import TodoFooter from "./components/TodoFooter.vue";
import TodoHeader from "./components/TodoHeader.vue";
import TodoList from "./components/TodoList.vue";
export default {
  name: "App",
  components: {
    TodoHeader,
    TodoList,
    TodoFooter,
  },
  data() {
    return {
        // todoArr:[
        //     // {id:"001",title:"吃饭",done:true},// id不用int因为有尽头
        //     // {id:"002",title:"睡觉",done:true},
        //     // {id:"003",title:"学习",done:false},
        //     // {id:"004",title:"爱臭宝",done:true},
        // ]
        todoArr:JSON.parse(localStorage.getItem('todos')) || []
    }
  },
  methods: {
    recieve(todo){
        this.todoArr.unshift(todo) //使用数组 向数组的开头添加一个或更多元素
    },
    //勾选或取消勾选，数据在哪里，处理就在哪里
    changeTodo(id){
      this.todoArr.forEach((todo) =>{
        if(id === todo.id){
            todo.done =!todo.done
        }
      })
    },
    delTodo(id){
      this.todoArr = this.todoArr.filter((todo)=>{
        return todo.id !==id  
      })
    },
    checkAllTodo(done){
      this.todoArr.forEach((todo) =>{
            todo.done =done
      })
    },
    clearAllTodo(){
      this.todoArr = this.todoArr.filter((todo)=>{
        return !todo.done
      })
    }
  },
  watch:{
      todoArr:{
        deep:true,
        handler(value){
          localStorage.setItem('todos',JSON.stringify(value))
        }
      }
  }
};
</script>

<style>
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>